The following table is a quick reference for most of the soybean pre-emergence herbicides listing the latest allowable application window.  A good “rule of thumb” I heard from an industry rep is that if we have an inch of soil between the emerging crook of the soybean and the herbicide application, we are probably still good to go.  However, remember that THE LABEL IS THE LAW, so follow the label.  Other cautions: 1) Soybeans will emerge VERY quickly after this rainfall if soils are warm.  Sprayers need to monitor fields closely as emergence changes literally in a few hours; 2) Emerging beans are very brittle, especially after the rain.  Sprayer tires (lugs, primarily) will break emerging beans off.  Remember that any break BELOW the cotyledons will not regrow.